Taking the heat: Sensors for high temperature dynamic measurements
When selecting sensing instruments for measuring dynamic events in very high temperature (>250°C) applications, it involves much more than just matching the temperature rating of the accelerometer or pressure transducer to the test environment.
At very high temperatures, every component has to work together in a synergistic fashion. The cable that transmits the signals has to be able to withstand the environment and without adding triboelectric noise. The charge converter that receives and conditions the signal should match the output impedance of the sensor over its entire temperature range.
As a leading provider of pressure and vibration sensors for the most demanding aerospace, nuclear, turbine and industrial control measurement applications, Meggitt’s advanced sensors are proven to withstand the challenges of extreme environments.
Our small, lightweight sensors excel in high temperatures to +760 °C, and provide long term, stable performance. Typically, the higher temperature applications require a hard line cable but Meggitt has recently developed an intriguing alternative that has the temperature capacity of a high temperature mineral insulated hardline cable yet is extremely flexible like a soft line cable. It is ideal for installations that require flexibility for cable routing, low noise and temperatures up to 538°C.
– Able to withstand extreme heat (+1400˚F, +760ºC)
– Long term, stable performance
– Small size & lightweight
Sensors for high temperature apply for:
– Gas turbine vibration measurements
– Combustion chamber performance testing and monitoring
– Turbine exhaust pressure measurements
Meggitt offers vibration sensors model at different temperature:
- At +500°F /+750°F (+260°C / +399°C), model: 2220E, 2230E/EM1, 6222S, 2273AM1/2273AM20.
- At +900°F (+482°C), model: 2276, 2248 / 2248M1, 6233C, 2280.
- At +1400°F (+760°C), model: 6240M10, 6243MX, 6237M7X.
Our piezoelectric accelerometers are designed specifically for use in extremely high temperature environments seen in combustion turbine applications. Several of these accelerometers are designed for continuous operation at +1200˚F (+650˚C) and intermittent operation (defined as 5 minutes over a 60 minute period) up to +1400˚F (+760˚C). These small and light weight accelerometers facilitate installation in cramped locations with minimal structural support.
Besides, Meggitt also offers pressure sensors model 522M series for high temperature measurement. The model 522M series is a family of high reliability piezoelectric pressure transducers, expressly designed for dynamic measurement of pressure fluctuations, even in extreme temperatures of up to +1000°F continuous and up to +1200°F intermittent and within high static pressure environments.
Featuring an all-welded Inconel® construction for maximum temperature survi vability, 522M series features an integral metal-sheathed hardline cable of either triaxial construction that offers output signal-to-case isolation or a shielded twisted-pair for a differential output. The electrical design of these sensors is fully optimized for use with both single-ended and differential amplifiers.
Download catalog Meggitt_HighTemp Sensors_TurbineEngineTesting_v12-20-18 WEB
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